Made some more progress today on the build. Fixed a stress crack in the hood, ground and painted my frame extensions and did some other stuff.
While under the car I took a measurement from the front firewall to the beam. 6 1/4 inches, roughly.
The VW master cylinder is a bit more than 7 inches.
I have an idea of how to make one fit, but I wonder if anyone has the solution to this already set so they can share it with me.